He said: “This is a very important appointment from the perspective of Wylfa Power Station and Anglesey.”

“I’m confident that the NDA’s procurement process and technical understanding of the site will ensure the best outcomes from both a safety and commercial perspective.”

“The track record of the companies involved in CFP also gives us confidence in a safe transition from energy generation to decommissioning of the Wylfa site.”

CFP, the preferred bidder to take over Magnox Ltd and Research Sites Restoration Ltd, is a joint venture between Cavendish Nuclear and Fluor Corporation.

Four tender submissions which were evaluated against a range of criteria including health, safety and security, underpinning technical rationale, commercial terms, approach to socio-economics and cost.

John Clarke, NDA chief executive, said: “Cavendish Fluor Partnership bring a successful track record and extensive nuclear experience that will bring enormous benefits to the decommissioning and clean-up programme."

A mandatory standstill period and a five-month transition phase will follow while the contract between the NDA and Cavendish Fluor Partnership is finalised and all legal processes are completed.

During the transition period, members of the new executive team will introduce themselves to the workforce and the current management team.